What consumer-usable tools exist for font creation?
Ideally I'd like an OSS solution, but inexpensive commercial offerings are viable, too.
One popular option is Font Creator. Very huge options, full control, overall very nice piece of software in my opinion.
You could also try the yourfonts.com which allows you to input handwriting letters to your own font with few steps. (In a more easy way than with Font Creator)
I think these free options available might be good enough for you or anyone creating own fonts.
Maybe Fontself could be interesting.
It is not really expensive ($49) and really consumer-usable because it makes it easy to create your font right from Adobe Illustrator without deep knowledge about typography.